Add section switching to common code generator code. Add a couple of

asserts.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24445 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/RegAllocLinearScan.cpp

@@ -547,6 +547,7 @@ void RA::assignRegOrStackSlotAtInterval(LiveInterval* cur)
       minReg = reg;
     }
   }
+  assert(minReg && "Didn't find any reg!");
   DEBUG(std::cerr << "\t\tregister with min weight: "
         << mri_->getName(minReg) << " (" << minWeight << ")\n");